http://hdl.handle.net/2433/255594
10.1029/2020jb019936
https://onlinelibrary.wiley.com/doi/pdf/10.1029/2020JB019936
https://onlinelibrary.wiley.com/doi/full-xml/10.1029/2020JB019936
https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2020JB019936
120006892069
学術雑誌論文(journal article)
Along‐dip variation in seismic radiation of the 2011 Ibaraki‐oki, Japan, earthquake ( M w 7.9) inferred using a multiple‐period‐band source inversion approach
Along‐Dip Variation in Seismic Radiation of the 2011 Ibaraki‐Oki, Japan, Earthquake (<i>M</i><sub>w</sub> 7.9) Inferred Using a Multiple‐Period‐Band Source Inversion Approach
en
Abstract
To elucidate the spatial variation in period‐dependent seismic radiation for the 2011 Ibaraki‐oki earthquake (Mw 7.9) in Japan, we applied a multiple‐period‐band source inversion approach to near‐source strong‐motion waveforms of this earthquake. We estimated source models of this earthquake in three successive period bands (5–10, 10–25, and 25–50 s) using strong‐motion data and Green's functions based on a 3‐D velocity structure model. The source models in the period bands of 10–25 and 25–50 s had large slips in the area to the south and southeast of the hypocenter in the depth range of 23–35 km, while the large slip area for the source model in the period band of 5–10 s was located in the deeper region ~30 km west of the hypocenter in the depth range of 35–45 km. These results indicate that long‐period (10–25 and 25–50 s) and short‐period (5–10 s) seismic waves were predominantly radiated from these different regions along the dip direction during the 2011 Ibaraki‐oki earthquake. This along‐dip variation in the dominant period of seismic radiation can be explained by the variation in scale in unstable sliding patches according to depth.
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Kubo, Hisahiko
久保, 久彦
National Research Institute for Earth Science and Disaster Resilience, Tsukuba
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Asano, Kimiyuki
浅野, 公之
Disaster Prevention Research Institute, Kyoto University
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DA16960385
https://ci.nii.ac.jp/author/DA16960385#entity
https://viaf.org/viaf/sourceID/NII%7CDA16960385
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Iwata, Tomotaka
岩田, 知孝
Disaster Prevention Research Institute, Kyoto University
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Aoi, Shin
青井, 真
National Research Institute for Earth Science and Disaster Resilience, Tsukuba
21699313
21699313
21699356
Journal of Geophysical Research: Solid Earth
American Geophysical Union (AGU)
2020-10
125
10
false
http://purl.org/coar/access_right/c_abf2
An edited version of this paper was published by AGU. Copyright 2020 American Geophysical Union.
The full-text file will be made open to the public on 30 March 2021 in accordance with publisher's 'Terms and Conditions for Self-Archiving'.
17K14384
JP17K14384
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17K14384/
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oai:irdb.nii.ac.jp:01221:0004598147
10.1029/2020jb019936
120006892069
PRODUCT-23359822